White Rodgers 1F87-251 User manual

Brand: White Rodgers

Model: 1F87-251

Category: Thermostats

Type: User manual

This manual is also suitable for

1F87-361

Do not use on circuits exceeding specified voltage.

Higher voltage will damage control and could cause

shock or fire hazard.

Do not short out terminals on gas valve or primary

control to test. Short or incorrect wiring will damage

thermostat and could cause personal injury and/or

property damage.

Thermostat installation and all components of the

system shall conform to Class II (current limited) cir-

cuits per the NEC code. Failure to do so may cause a

fire hazard.

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY

BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE

PERSONAL INJURY AND/OR PROPERTY DAMAGE.

DESCRIPTION

Your new White-Rodgers 7-Day Digital Thermostat uses the

technology of a solid-state microcomputer to provide precise

time/temperature control. This thermostat offers you the flexibil-

ity to design heating and cooling programs that fit your needs.

Features:

• Separate program for each day of the week with four separate

time/temperature settings per day

• Simultaneous heat and cool program storage

• Preprogrammed temperature control

• LCD continuously displays setpoint, and alternately dis-

plays time and room temperature

• Backlit display

• Temperature override until next program period

• Manual program override (HOLD temperature)

• °F/°C convertibility

• Temperature range 45° to 90°F

• RC, RH, W, Y, G , O and B terminals

• B and O terminals for single stage heat pumps (no auxiliary

heat) or damper operation

• Program storage in case of power loss.

• Battery powered (2 "AA" Energizer

alkaline batteries in-

cluded)

SPECIFICATIONS

ELECTRICAL DATA

Electrical Rating:

8 to 30 VAC 50/60 Hz. or D.C.

0.05 to 1.0 Amps (Load per terminal)

1.5 Amps Maximum Total Load (All terminals combined)

THERMAL DATA

Setpoint Temperature Range:

45°F to 90°F (7°C to 32°C)

Operating Ambient Temperature Range:

32°F to 105°F

Operating Humidity Range:

0 to 90% RH (non-condensing)

Shipping Temperature Range:

-4°F to 150°F

APPLICATIONS

For use with:

• Standard heat/cool or heat only systems

• Electric heat systems

• Gas or oil fired systems

• Gas systems with intermittent ignition devices (I.I.D.)

and/or vent dampers

• Hydronic (hot water or steam) systems

• Single-stage heat pump systems (no auxiliary heat)

• Millivolt systems

DO NOT USE WITH:

• Multi-stage systems

• Systems exceeding 30 VAC and 1.5 amps

• 3-wire zoned hydronic heating systems

1F87-251

Programmable Electronic Digital Thermostat

PART NO. 37-6417C

Replaces 37-6417B

0441

WHITE-RODGERS

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

www.white-rodgers.com

INSTALLATION AND

OPERATION INSTRUCTIONS

PRECAUTIONS

CAUTION

This thermostat is intended for use with a low voltage system;

do not use this thermostat with a line voltage system. If in doubt

about whether your wiring is millivolt, line, or low voltage, have

it inspected by a qualified heating and air conditioning contractor

or electrician.

Do not exceed the specification ratings.

All wiring must conform to local and national electrical codes and

ordinances.

This control is a precision instrument, and should be handled

carefully. Rough handling or distorting components could cause

the control to malfunction.

To prevent electrical shock and/or equipment dam-

age, disconnect electric power to system at main fuse

or circuit breaker box until installation is complete.

WARNING

Operator: Save these instructions for future use!

INSTALLATION

REMOVE OLD THERMOSTAT

1. Shut off electricity at the main fuse box until installation is

complete. Ensure that electrical power is disconnected.

2. Remove the front cover of the old thermostat. With wires

still attached, remove wall plate from the wall. If the old

thermostat has a wall mounting plate, remove the thermostat

and the wall mounting plate as an assembly.

3. Identify each wire attached to the old thermostat using

the labels enclosed with the new thermostat.

4. Disconnect the wires from old thermostat one at a time. DO

NOT LET WIRES FALL BACK INTO THE WALL.

5. Install new thermostat using the following procedures.

ATTENTION!

This product does not contain mercury. However, this product

may replace a unit which contains mercury.

Do not open mercury cells. If a cell becomes damaged, do not

touch any spilled mercury. Wearing nonabsorbent gloves, take

up the spilled mercury with sand or other absorbent material and

place into a container which can be sealed. If a cell becomes

damaged, the unit should be discarded.

Mercury must not be discarded in household trash. When the

unit this product is replacing is to be discarded, place in a

suitable container and return to White-Rodgers at 2895 Harrison

Street, Batesville, AR, 72501-2117 for proper disposal.

ELECTRIC HEAT OR SINGLE-STAGE

HEAT PUMP SYSTEMS

This thermostat is configured from the factory to operate a heat/

cool, fossil fuel (gas, oil, etc.), forced air system. It is configured

correctly for any system that DOES NOT require the thermostat

to energize the fan on a call for heat. If your system is an electric

heat or heat-pump system that REQUIRES the thermostat to

turn on the fan on a call for heat, locate the ELECTRIC/GAS

switch on the back of the thermostat (see fig. 1) and switch it to

the ELECTRIC position. This will allow the thermostat to ener-

gize the fan immediately on a call for heat. If you are unsure if

the heating/cooling system requires the thermostat to control

the fan, contact a qualified heating and air conditioning service

person.

ATTACH THERMOSTAT BASE TO WALL

1. Remove the packing material from the thermostat. Gently

pull the cover straight off the base. Forcing or prying on the

thermostat will cause damage to the unit. If necessary, move

the electric heat switch (see ELECTRIC HEAT SYSTEMS,

above).

2. Connect wires beneath terminal screws on base using

appropriate wiring schematic (see figs. 2 through 7).

3. Place base over hole in wall and mark mounting hole

locations on wall using base as a template.

4. Move base out of the way. Drill mounting holes.

5. Fasten base loosely to wall, as shown in fig. 1, using two

mounting screws. Place a level against bottom of base,

adjust until level, and then tighten screws. (Leveling is for

appearance only and will not affect thermostat operation.) If

you are using existing mounting holes, or if holes drilled are

too large and do not allow you to tighten base snugly, use

plastic screw anchors to secure subbase.

6. Push excess wire into wall and plug hole with a fire-resistant

material (such as fiberglass insulation) to prevent drafts from

affecting thermostat operation.

BATTERY LOCATION

2 "AA" alkaline batteries are included in the thermostat at the

factory with a battery tag to prevent power drainage. You must

remove the battery tag to engage the batteries.

If "LO BATT" is displayed, the batteries are low and should be

replaced with fresh "AA" Energizer

alkaline batteries. To re-

place batteries, install the batteries along the top of the base

(see Fig. 1). The batteries must be installed with the positive (+)

end to the left.

HYDRONIC (HOT WATER OR STEAM)

HEATING SYSTEMS

This thermostat is set to operate properly with a forced-air

heating system. If you have a hydronic heating system (a system

that heats with hot water or steam), you must set the thermostat

to operate properly with your system. Change the second option

in the configuration menu to SL (see CONFIGURATION MENU,

page 4).

CHECK THERMOSTAT OPERATION

If at any time during testing your system does not operate

properly, contact a qualified service person.

Turn on power to the system.

Fan Operation

If your system does not have a G terminal connection, skip to

Heating System.

1. Move FAN switch to ON position. The blower should begin

to operate.

2. Move FAN switch to AUTO position. The blower should stop

immediately.

Mounting

holes

Mounting

holes

Electric/Gas

switch

Screw anchors

Figure 1. Thermostat Base

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 5. Typical wiring diagram for

heat/cool, 5-wire, two-transformer systems

HEATING TRANSFORMER

(Class II Current Limited)

Heating

System

Fan

Relay

Cooling

System

24 VAC

120 VAC

Hot

Neutral

COOLING TRANSFORMER

(Class II Current Limited)

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 4. Typical wiring diagram for

heat/cool, 4-wire, single transformer systems

Heating

System

Fan

Relay

Cooling

System

JUMPER

WIRE

RED jumper wire (provided with thermostat) must be

connected between thermostat RH and RC terminals

for proper thermostat operation with this system.

NOTE

TRANSFORMER

(Class II Current Limited)

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 2. Typical wiring diagram for

heat only, 3-wire, single transformer systems

TRANSFORMER

(Class II Current Limited)

Heating

System

Fan

Relay

JUMPER

WIRE

For 2-wire Heat only,

attach to RH and W

NOTE

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 7. Typical wiring diagram for heat pump

with reversing valve energized in HEAT

Reversing

Valve*

RCOB

JUMPER

WIRE

Compressor

Contactor

JUMPER

WIRE

* Reversing valve is energized when the

system switch is in the HEAT position

Fan

Relay

TRANSFORMER

(Class II Current Limited)

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 3. Typical wiring diagram for

cool only, 3-wire, single transformer systems

Cooling

System

Fan

Relay

RCOB

JUMPER

WIRE

TRANSFORMER

(Class II Current Limited)

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 6. Typical wiring diagram for heat pump

with reversing valve energized in COOL

Reversing

Valve*

RCOB

JUMPER

WIRE

Compressor

Contactor

JUMPER

WIRE

* Reversing valve is energized when the

system switch is in the COOL position

Fan

Relay

TRANSFORMER

(Class II Current Limited)

Heating System

1. Move SYSTEM switch to HEAT position. If the heating

system has a standing pilot, be sure to light it.

2. Press to adjust thermostat setting above room tempera-

ture. The heating system should begin to operate.

3. Press

to adjust temperature setting below room tem-

perature. The heating system should stop operating.

CAUTION

Cooling System

To prevent compressor and/or property damage, if the

outdoor temperature is below 50°F, DO NOT operate

the cooling system.

1. Move SYSTEM switch to COOL position.

2. Press

to adjust thermostat setting below room tem-

perature. The blower should come on immediately on high

speed, followed by cold air circulation

3. Press to adjust temperature setting above room tem-

perature. The cooling system should stop operating.

Press HOLD to change to the next menu item or press TIME to

go backwards to the previous item in the menu. To exit the menu

and return to the program operation, press RUN. If no keys are

pressed within fifteen minutes, the thermostat will revert to

normal operation.

1) Select FA or SL (Fast or Slow) Heating Cycle Rate - The

FA setting is frequently used for gas, oil or electric heat. The

SL setting produces a longer heating cycle which is nor-

mally for hot water or steam (hydronic) systems. Both

settings produce very accurate temperature control and

can be set to your personal preference. FA cycles the

system just under 1°F and the SL setting cycles at approxi-

mately 1.5°F.

2) Select backlit display - The display backlight improves

display contrast in low lighting conditions. Selecting back-

light ON will keep the light on for a short period of time after

any key is pressed. Selecting OFF will keep the light off.

3) Select Energy Management Recovery OFF or ON -

Energy Management Recovery (EMR) causes the thermo-

stat to start heating or cooling early to make the building

temperature reach the program setpoint at the time you

specify. Heating will start 5 minutes early for every 1° of

temperature required to reach setpoint.

Example: You select EMR and have your heating pro-

grammed to 65° at night and 70° at 7 AM. If the building

temperature is 65° the difference between 65° and 70° is 5°.

Allowing 5 minutes per degree the thermostat setpoint will

change to 70° at 6:35 AM. Cooling allows more time per

degree because it takes longer to reach temperature.

4) Select filter replacement run time - The thermostat will

display "FLTR" after a set time of operation. This is a

reminder to change or clean your air filter. This time can be

set from 0 to 1950 hours in 50 hour increments. A selection

of 000 will cancel this feature. When "FLTR" is displayed,

you can clear it by pressing HOLD and RUN at the same

time. This resets the timer and starts counting the hours

until the next filter change. Changing the time in the menu

also resets the timer.

Before you begin programming your thermostat, you should be

familiar with its features and with the display and the location and

operation of the thermostat buttons. Your thermostat consists of

two parts: the thermostat cover and the base. To remove the

cover, pull it straight out from the base. To replace the cover, line

up the cover with the base and press until the cover snaps onto

the base.

The Thermostat Buttons and Switches

Raises temperature setting.

Lowers temperature setting.

TIME button.

PRGM (program) button.

RUN (run program) button.

HOLD temperature button.

FAN switch (ON, AUTO).

SYSTEM switch (COOL, OFF, HEAT).

The Display

Indicates day of the week.

Flame icon ( ) is displayed when the SYSTEM switch is in

the HEAT position. Snowflake icon (

)is displayed (non-

flashing) when the SYSTEM switch is in the COOL position.

Snowflake is displayed (flashing) if the thermostat is in

lockout mode to prevent the compressor from cycling too

quickly.

Displays "LO BATT" when the 2 "AA" batteries are low and

should be replaced. Nothing else will be displayed.

Alternately displays current time and temperature. Displays

"LO" in the minutes field when batteries are low.

The word "HOLD" is displayed when the thermostat is in

the HOLD mode.

Displays currently programmed set temperature (this is

blank when SYSTEM switch is in the OFF position).

Displays "FLTR" when the system has run for the pro-

grammed filter time period as a reminder to change or clean

your air filter.

CONFIGURATION MENU

The configuration menu allows you to set certain thermostat

operating characteristics to your system or personal require-

ments.

Press RUN to make sure the thermostat is in the run program

mode, then press PRGM and RUN at the same time to enter the

configuration menu. The display will show the first item in the

configuration menu.

The configuration menu table summarizes the configuration

options. An explanation of each option follows.

3 4 5 6 7

10 1315 11

1012 12

Figure 8. Thermostat display, buttons, and switches

BATTHOLD

FLTR

MO TU WE TH FR

TIME PRGM RUN HOLD

Fltr

FAN SYSTEM

ON AUTO COOL OFF HEAT

OPERATION

5) Select Compressor Lockout LOC OFF or ON - Selecting

LOC ON will cause the thermostat to wait 5 minutes before

turning on the compressor if the heating and cooling system

loses power. It will also wait 5 minutes minimum between

cooling cycles. This is intended to help protect the compres-

sor from short cycling. Some newer compressors already

have a time delay built in and do not require this feature.

Your compressor manufacturer can tell you if the feature is

already present in their system. When the compressor time

delay occurs it will flash the (snowflake icon) for about five

minutes then turn on the compressor.

6) Select Temperature Display Adjustment 4 LO to 4 HI -

Allows you to adjust the room temperature display 4° higher

or lower. Your thermostat was accurately calibrated at the

factory but you have the option to change the display

temperature to match your previous thermostat.

7) Select F° or C° Readout - Changes the display readout to

Centigrade or Fahrenheit as required.

OPERATING FEATURES

Now that you are familiar with the thermostat buttons and

display, read the following information to learn about the many

features of the thermostat.

• SIMULTANEOUS HEATING/COOLING PROGRAM

STORAGE — When programming, you can enter both your

heating and cooling programs at the same time. There is no

need to reprogram the thermostat at the beginning of each

season.

• TEMPERATURE OVERRIDE — Press

or until the

display shows the temperature you want. The thermostat

will override current programming and keep the room

temperature at the selected temperature until the next

program period begins. Then the thermostat will automati-

cally revert to the program.

• HOLD TEMPERATURE — The thermostat can hold any

temperature within its range for an indefinite period without

reverting to the programmed temperature. Momentarily

press HOLD button. "HOLD" will be displayed. Then choose

Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS

(FA)

(ON)

OFF

LOC

(OFF)

0 HI

(0)

4 LO to

4 HI

(F) C

Returns to normal operation

Select Energy Management Recovery OFF or ON

Select Compressor lockout OFF or ON

Select temperature display adjustment higher or lower

Select temperature display to F or C

RUN

PRGM

and RUN

HOLD

d-L

(ON)

OFF

Select display backlight OFF or ON

HOLD

Filter

(000)

0 to 1950 hours

(in 50 hour increments)

Select filter replacement run time

HOLD

Select FA or SL (Fast or Slow) heating cycle rate

Configuration Menu

* Press

HOLD to advance to next item or TIME to move backwards to previous item

the desired temperature by pressing or . The

thermostat will hold the room temperature at the selected

setting until you press RUN button to start program opera-

tion again.

• LOW BATTERY INDICATOR—If the 2 “AA” alkaline bat-

teries are low and should be replaced, the display will be

blank except for “LO BATT”. When the batteries are low,

pressing any button will cause the display to operate for ten

seconds. After ten seconds, the display will be blank except

for “LO BATT”. You cannot program with low batteries, but

you can override setpoint temperature. After “LO BATT”

has been displayed for 4 weeks, the thermostat will raise

the temperature 10 degrees above your setpoint on COOL

mode and will drop temperature 10 degrees below your

setpoint on HEAT mode.

• SIMPLIFIED COPY DAY FUNCTION — This feature al-

lows Monday's program to be copied into the rest of the

week's programming. This feature is available the first

time you program your thermostat. To use this feature,

simply enter the program for Monday as described in

PROGRAMMING YOUR THERMOSTAT, and then press

RUN or HOLD. The only way to restore this feature is to

complete a software reset (see Reset Operation under

TROUBLESHOOTING section).

• COPY DAY FUNCTION — This feature allows a selected

day's program to be copied to the desired day's program-

ming. To use this feature: in PRGM mode, select the day

to be copied

from by pressing the HOLD button. Enter the

program for the selected day as described in PROGRAM-

MING YOUR THERMOSTAT. Press and hold the TIME

button for 4 seconds to begin the Copy mode. The LCD will

display "COPY" and the selected day to be copied. The

day the program will copy to will be flashing. Press the

HOLD button to select the day you want to copy to. Press

TIME to complete the Copy Day operation and return to

PRGM mode. Press RUN to exit.

PROGRAMMING YOUR THERMOSTAT

This section will help you plan your thermostat’s program to

meet your needs. For maximum comfort and efficiency, keep the

following guidelines in mind when planning your program.

• When heating (cooling) your building, program the tem-

peratures to be cooler (warmer) when the building is vacant

or during periods of low activity.

• During early morning hours, the need for cooling is usually

minimal.

Planning Your Program

Look at the factory preprogrammed times and temperatures

shown in the sample schedule. If this program will suit your

needs, simply press the RUN button to begin running the factory

preset program.

If you want to change the preprogrammed times and tempera-

tures, follow these steps.

Determine the time periods and temperatures for your week-

day and weekend programs. You must program four periods

for each day program. However, you may use the same heating

and cooling temperatures for consecutive time periods. You

can choose start times, heating temperatures, and cooling

temperatures independently for each day programs (for ex-

ample, you may select 5:00 AM and 70° as the Monday 1st

period heating start time and temperature, and also choose

7:00 AM and 76° as the Monday 1st period cooling start time

and temperature).

Use the following table to plan your program time periods and

the temperatures you want during each period. Fill in the

complete table to have a record of your programs.

Entering Your Program

Follow these steps to enter the heating and cooling programs

you have selected.

Set Current Time and Day

1. Press TIME button once. The display will show the hour only.

EXAMPLE:

2. Press and hold either or until you reach the correct

hour and AM/PM designation (AM begins at midnight; PM

begins at noon).

3. Press TIME once. The display window will show the minutes

only.

EXAMPLE:

4. Press and hold either or until you reach the correct

minutes.

5. Press TIME once. The display will show the day of the week.

6. Press

or until you reach the current day of the week.

7. Press RUN once. The display will show the correct time and

room temperature alternately.

Enter Heating Program

1. Move the SYSTEM switch to HEAT.

2. Press PRGM once. “MO” (indicating Monday program) will

appear in the display. Also displayed are the currently

programmed start time for the 1st heating period and the

currently programmed temperature (flashing).

EXAMPLE:

This display window shows that for Monday's 1st heating

period, the start time is 6:00 AM, and 70° is the programmed

temperature (this example reflects factory preprogramming).

3. Press

or to change the displayed temperature to

your selected temperature for Monday's 1st heating program

period.

4. Press TIME once (the programmed time will flash). Press

or until your selected start time for Monday's 1st

heating program period appears. The time will change in 15

minute increments. When your selected time is displayed,

press TIME again to return to the change temperature mode.

PERIOD 1

Time Temp Time Temp

Heating/Cooling Schedule Plan

Mon

Tues

Wed

Thur

Fri

Sat

Sun

HEAT COOL

PERIOD 2

Time Temp Time Temp

HEAT COOL

PERIOD 3

Time Temp Time Temp

HEAT COOL

PERIOD 4

Time Temp Time Temp

HEAT COOL

1ST

2ND

3RD

4TH

1ST

2ND

3RD

4TH

SAMPLE

Heating/Cooling Schedule Plan (Factory Program)

6:00 AM

8:00 AM

5:00 PM

10:00 PM

6:00 AM

8:00 AM

5:00 PM

10:00 PM

70° F

62° F

70° F

62° F

78° F

85° F

78° F

82° F

ALL DAYS OF THE WEEK

Start Time Temperature

Period

COOL HEAT

5. Press PRGM once. The currently programmed start time

and setpoint temperature for the Monday's 2nd heating

program period will appear.

6. Repeat steps 3 and 4 to select the start time and heating

temperature for Monday's 2nd heating program period.

7. Repeat steps 3 through 5 for the 3rd and 4th heating program

periods. Monday heating programs are now complete.

NOTE

If you are programming your thermostat for the first time and you

want programming for all days of the week to be the same as

Monday's program, press RUN or HOLD at this point, and

proceed to Enter Cooling Program. (This simplified COPY

DAY feature only works the first time you program your thermo-

stat. If you want to copy one day's programming to a specific day

programming, refer to COPY DAY FUNCTION in OPERATING

FEATURES. If you are changing your thermostat's program-

ming, you must program each day separately.)

8. Press HOLD once. “TU” (indicating Tuesday program) will

appear in the display, along with the start time for the 1st

heating period and the currently programmed temperature.

9. Repeat steps 3 through 7 to complete Tuesday's heating

programming.

10.Continue entering each day's programming until all heating

periods time and temperatures have been entered.

11.When you have completed entering your heating program,

press RUN.

Enter Cooling Program

If the outside temperature is below 50°F, disconnect

power to the cooling system before programming.

Energizing the air conditioner compressor during

cold weather may cause personal injury or property

damage.

1. Move SYSTEM switch to COOL position.

2. Follow the procedure for entering your cooling program,

using your selected cooling times and temperatures.

CHECK YOUR PROGRAMMING

Follow these steps to check your thermostat programming one

final time before beginning thermostat operation.

1. Move SYSTEM switch to HEAT position.

2. Press PRGM to view the 1st Monday heating period time and

temperature. Each time you press PRGM, the next heating

period time and temperature will be displayed in sequence

for Monday. Press HOLD to display Tuesday's 1st heating

period, and press PRGM to view each of the remaining

Tuesday's heating period time and temperatures. To view

ech day's heating program, press HOLD to change day and

them press PRGM to look at wach programming period for

the day. (You may change any time or temperature during

this procedure.)

3. Press RUN.

4. Move SYSTEM switch to COOL position.

5. Repeat step 2 to check cooling program.

6. Move SYSTEM switch to HEAT or COOL and press RUN to

begin program operation.

YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND

READY TO PROVIDE MAXIMUM COMFORT AND EFFICIENCY!

CAUTION

TROUBLESHOOTING

Reset Operation

If a voltage spike or static discharge blanks out the display or

causes erratic thermostat operation you can reset the thermo-

stat by pressing

, and TIME at the same time. This also

resets the factory defaults to the configuration menu and

program. If the thermostat has power, has been reset and still

does not function correctly contact your heating/cooling ser-

vice person or place of purchase.

Batteries

For optimum performance, we recommend replacing batteries

once a year with fresh "AA" Energizer

alkaline batteries.

Symptom Possible Cause Corrective Action

o Heat/No Cool/No Fan 1. Blown fuse or tripped circuit breaker. Replace fuse or reset breaker.

(common problems) 2. Furnace power switch to OFF. Turn switch to ON.

3. Furnace blower compartment door or Replace door panel in proper position to engage

panel loose or not properly installed. safety interlock or door switch.

No Heat 1. Pilot light not lit. Re-light pilot.

2. SYSTEM Switch not set to HEAT. Set SYSTEM Switch to HEAT and raise setpoint

above room temperature.

3. Loose connection to thermostat or system. Verify thermostat and system wires are securely Attached.

4. Furnace Lock-Out Condition. Heat may also Many furnaces have safety devices that shut the system

be intermittent. down when a lock-out condition occurs. If the heat works

intermittently contact the furnace manufacturer or local

service person for assistance.

5. Heating System requires service or Diagonistic: Set SYSTEM Switch to HEAT and raise the

thermostat requires replacement. setpoint above room temperature. Within a few seconds

the thermostat should make a soft click sound. This

sound usually indicates the thermostat is operating

properly. If the thermostat does not click, try the reset

operation listed above. If the thermostat does not click

after being reset, contact your heating and cooling

service person or place of purchase for a replacement.

If the thermostat clicks, contact the furnace manufacturer

or a service person to verify the heating system is

operating correctly.

No Cool 1. SYSTEM Switch not set to COOL. Set SYSTEM Switch to COOL and lower setpoint below

room temperature.

2. Loose connection to thermostat or system. Verify thermostat and system wires are securely attached.

3. Cooling System requires service or thermostat Same procedure as diagnostic for No Heat condition

requires replacement. except set the thermostat to COOL and lower the setpoint

below the room temperature. There may be up to a five

minute delay before the thermostat clicks in Cooling if

the compressor lock-out option is selected in the

configuration menu (Item 6).

Heat, Cool or Fan Runs Constantly 1. FAN Switch set to Fan ON. Check each wire connection to verify they are not

2. Possible short in wiring. shorted or touching together. No bare wire should

3. Possible short in thermostat. stick out from under terminal screws.

4. Possible short in Heat/Cool/Fan system. Try resetting the thermostat. If the condition persists

the manufacturer of your system or service person can

instruct you on how to test the Heat/Cool system for

correct operation. If the system operates correctly,

replace the thermostat.

Furnace Cycles Too Fast or Too Slow 1. The location of the thermostat and/or the size Item 2 in the Configuration Menu is the adjustment

(narrow or wide temperature swing) of the Heating System can influence the cycle rate. that controls the cycle rate. If an acceptable cycle

rate is not achieved using the FA (Fast) or SL

(Slow) adjustment contact a local service person for

additional suggestions.

Cooling Cycles Too Fast or Too Slow 1. The location of the thermostat and/or the size of the The cycle rate for cooling is fixed and can not be adjusted.

(narrow or wide temperature swing) Cooling System may be influencing thecycle rate. Contact a local service person for suggestions.

Thermostat Setting and Thermometer 1. Thermostat thermometer setting requires The thermometer can be adjusted +/- 4 degrees as listed

Disagree adjustment. in item 7 of the Configuration Menu. No other adjustment

is possible.

Clock Loses or Gains Time 1. Loss of power to thermostat and low batteries. The thermostat will maintain its program in memory even

with no power/no batteries but the clock time will be

incorrect when power is restored. See No Heat/No Cool/

No Fan (common problems) above for items to check in

the system.

Heat or Cool Starts Early 1. EMR activated See Configuration Menu (Item 4).

Thermostat Does Not Follow Program 1. AM or PM set incorrectly in program. Check current clock and program settings including

2. AM or PM set incorrectly on the clock. the AM or PM designations for each time period.

3. Voltage spike or static discharge. If a voltage spike or static discharge occurs use the

Reset Operation listed above.

Blank Display and/or Keypad Not 1. Loss of power and dead batteries. Replace batteries and check heat/cool system for

Responding 2. Voltage Spike or Static Discharge. proper operation. If a voltage spike or static discharge

occurs use the Reset Operation listed above.

TROUBLESHOOTING (cont.)

White Rodgers 1F87-251 User manual

Brand: White Rodgers

Model: 1F87-251

Category: Thermostats

Type: User manual

This manual is also suitable for

1F87-361

Download PDF

report

White Rodgers 1F87-251 User manual

This manual is also suitable for

White Rodgers 1F87-251 User manual

Related papers

Other documents